期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 44, 期 10, 页码 5995-6010出版社
SPRINGER
DOI: 10.1007/s11164-018-3471-4
关键词
Solvothermal; Hierarchical; Cabbage-like microspheres; -Bi2O3; Bi2O2CO3; Heterojunction; Photocatalysis
资金
- National Natural Science Foundation of China [21567008, 21707055]
- Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology
- Program of 5511 Talents in Scientific and Technological Innovation of Jiangxi Province [20165BCB18014]
- Academic and Technical Leaders of the Main Disciplines in Jiangxi Province [20172BCB22018]
- Jiangxi Province Natural Science Foundation [20161BAB2 03090]
- Natural Science Foundation of Fujian Province of China [2015J01062]
- Program for New Century Excellent Talents in Fujian Province University
Novel hierarchical -Bi2O3/Bi2O2CO3 composite microspheres were fabricated via phase transformation under solvothermal condition. The obtained products were characterized by N-2 physical adsorption, powder X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy, and photoluminescence emission spectroscopy. The results showed that solvothermal temperatures exerted a large influence on the phase composition and morphologic structure. Low solvothermal temperatures (120, 140 degrees C) produced the -Bi2O3 phase. When the temperature increased to 160 degrees C, -Bi2O3 began to transform to Bi2O2CO3 phase, and cabbage-like -Bi2O3/Bi2O2CO3 composite microspheres were produced. At 180 degrees C, -Bi2O3 totally transformed into Bi2O2CO3. Under xenon lamp irradiation, the degradation rate constant of rhodamine B over -Bi2O3/Bi2O2CO3 was 6.7 and 3.1 times of the -Bi2O3 and Bi2O2CO3, respectively. The high photocatalytic performance of the -Bi2O3/Bi2O2CO3 composite microspheres could be attributed to their large specific surface area, rich mesopores structures, and efficient light-harvesting capability. Moreover, the produced -Bi2O3/Bi2O2CO3 heterojunction can effectively restrain the recombination of photogenerated electrons and holes, which largely improved the photocatalytic performances.
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